CDC vs kitchen
Public pages talk about strep or Salmonella. They rarely mention the starter in a yogurt pot — both are bacteria.
CDC pages name specific diseases. They do not treat every rod under a microscope as an emergency. Yogurt and cheese cultures are bacteria on purpose.
School diagrams that colour all bacteria red teach fear first. The local lens here is naming: pathogen, starter culture, and environmental species are different jobs.
Local notes
FDA food cultures
Listed cultures in dairy are ingredients, not infections. Labels still use Latin binomials.
Public-health desks
Germ, bug and bacteria collapse in casual English. Keep the domain word when you mean the tree of life.
Official pages own schedules and treatment. This atlas does not.
More in Tree of microbes
Viruses
Packets of DNA or RNA that are not cells — they replicate only inside living hosts.
Familiarity 96Fungi
A eukaryotic kingdom of yeasts, moulds and mushrooms — chitin walls, external digestion, partners of plants.
Familiarity 80Archaea
A prokaryotic domain that is not bacteria — methanogens, extremophiles and no known human pathogens.
Familiarity 35Bacteriophages
Viruses that infect bacteria — Earth's most abundant biological entities, and a concept-level idea in medicine.
Familiarity 42Protozoa
Motile unicellular eukaryotes — a teaching grade that includes pond ciliates and a minority of serious parasites.
Familiarity 58